展开 sqrt(3)(-sqrt(10)+5)

解答

展开

3 (- 10 + 5)

- 30 + 53

十进制

3.18302 \dots

求解步骤

3 (- 10 + 5)

使用分配律:

a (b + c) = ab + a c

3 (- 10 + 5) = 3 (- 10) + 3 \cdot 5

= 3 (- 10) + 3 \cdot 5

3 (- 10) + 3 \cdot 5 = - 30 + 53

= - 30 + 53

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